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1 votes
1 votes
which of the following is inccorect for the meaning of null values?

A) value unknown
B) value exist but not available
C) attribute does not apply to this tupple
D) none

2 Answers

Best answer
1 votes
1 votes
I think option d is correct because rest of options are releted to null value. .
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2 votes
2 votes

NULL means its value doesnt exist in the present database u r working...so for u ,it's unknown....it's possible that it could exist somewhere but u dont know this...so option A is more suitable here....

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